Re: [OE-core] [PATCH] libpcre: fix occasionally do_package_write_rpm error

["Richard Purdie" <richard.purdie@linuxfoundation.org>]

On Wed, 2020-09-02 at 10:36 +0800, Changqing Li wrote:
> 
> On 9/1/20 7:08 PM, Richard Purdie wrote:
> > On Fri, 2020-08-28 at 14:14 +0800, Changqing Li wrote:
> > > From: Changqing Li <changqing.li@windriver.com>
> > > 
> > > Error info:
> > > ERROR: libpcre-8.44-r0 do_package_write_rpm: Failure expanding
> > > variable
> > > SUMMARY_libpcrecpp, expression was ${SUMMARY} - C++ wrapper
> > > functions
> > > which triggered exception RecursionError: maximum recursion depth
> > > exceeded while calling a Python object
> > > 
> > > this error is hard to reproduce, only met one time. Seems expand
> > > SUMMARY with reference to SUMMARY cause a dead loop.
> > > 
> > > Signed-off-by: Changqing Li <changqing.li@windriver.com>
> > 
> > What is worrying me is why we can't reproduce this. It should fail
> > or
> > not fail, why do we only sometimes see this?
> > 
> > I'd like to understand the cause as it sounds like a determinism
> > problem somewhere.
> > 
> > Is there a sequence we can reproduce it with?
> 
> Unfortunately no, we also hard to reproduce this, only met one time
> on 08 Jul when build a wrlinux image.
> 
> And don't see it for about 2 months.

I'd like to have a better understanding of the issue before we merge
potential fixes as there are probably other recipes which also
reference SUMMARY like this and I don't want to patch them all without
understanding the problem.

Cheers,

Richard